body {
  font-family: Arial, sans-serif;
  max-width: 800px;
  margin: 50px auto;
  line-height: 1.6;
  color: #333;
}
nav {
  margin-bottom: 20px;
}
nav a {
  margin-right: 10px;
  color: #0066cc;
  text-decoration: none;
}
nav a:hover {
  text-decoration: underline;
}